| 主权项 |
1. A method for transmitting data in a communication system, comprising:
receiving first encapsulated data at a first node; generating second encapsulated data associated with the first encapsulated data at the first node; transmitting independently the first encapsulated data and the second encapsulated data to one or more further nodes, wherein the second encapsulated data comprises charging, topology and verification information and wherein the first encapsulated data comprises user traffic data; wherein the first encapsulated data and second encapsulated data are transmitted in separate encrypted data tunnels; and wherein the first encapsulated data and the second encapsulated data are prepended with a header specifying end points of their respective data tunnel; wherein the second encapsulated data is sent towards an access network providing access to services for a mobile node, the first encapsulated data being generated by or terminating at the mobile node; wherein the first encapsulated data is transmitted between the mobile node and the access network by a first tunnel, and the second encapsulated data is transmitted between the first node and the access network by a second tunnel, the first and second tunnels being independent from one another; wherein at least one of third and fourth encapsulated data is transmitted between a second node and the access network by a third tunnel, the third tunnel being independent from the first and second tunnels; wherein the second encapsulated data provides first topology information, associated with at least one of the mobile node and the first node, to the access network; wherein the third encapsulated data provides second topology information, associated with the mobile node, and at least one of the first node and second node, to the access network; and wherein the access network compares the first and the second topology information, and resolves any ambiguities therein via a verification function. |
